Philosophers who discuss the nature of time sometimes talk of the "A series" view versus the "B series" view. Here's the Wikipedia link: https://en.wikipedia.org/wiki/A-series_and_B-series The terminology goes back to the work of Scottish Hegelian McTaggart, writing a little more than a century ago. But the 21st century meaning of the labels may be a bit different from what McTaggart had in mind. "A-series" includes any view to the effect that the intuitive non-philosophic notion of time is more-or-less correct --there is a moving "now" and things that weren't real yesterday will become real tomorrow when the moving "now" gets there. The "B-series" view (again, in my imperfect understanding) is the view that there is only a single block universe already including tomorrow and next century etc. -- and the moving "now" is an illusion. McTaggart's work neatly coincided (in whatever time is) with Albe...